npm 更换源

临时使用

npm --registry https://registry.npm.taobao.org install express

持久使用

npm config set registry https://registry.npm.taobao.org

查看使用

npm config get registry

使用淘宝 cnpm

npm install -g cnpm --registry=https://registry.npm.taobao.org

其他源

npm ----https://registry.npmjs.org/
cnpm ---http://r.cnpmjs.org/
taobao -http://registry.npm.taobao.org/
eu -----http://registry.npmjs.eu/
au -----http://registry.npmjs.org.au/
sl -----http://npm.strongloop.com/
nj -----https://registry.nodejitsu.com/